Suprachiasmatic nucleus expialidocious

Here's some practical science. In every person's brain, there is a region called the suprachiasmatic nucleus (or SCN). The name isn't important, but the SCN is our internal clock that tries to keep our bodies and minds on a daily schedule. You may have learned at some point that the brain naturally gravitates toward a 24-25 hour day when you take away the factors of sunlight and such. I've always been aware of circadian rhythms, but I've never really known what they're all about. Here's how it generally breaks down...